Barminco Ltd., the owner of the mine, said in a dismissal letter that it considered the stunt a safety violation, which breached its “core values of safety, integrity and excellence.” The letter also noted that the mining contractor wouldn’t allow the dancing workers to be subcontracted at any of its sites, in Australia or elsewhere.

It’s not clear from the video what safety violations took place, the Associated Press noted. According to WestAustralian, the dancing miners wore helmets, lamps and glasses, and had oxygen on hand. They were, however, shirtless.

Barminco Ltd., the owner of the mine, said in a dismissal letter that it considered the stunt a safety violation, which breached its “core values of safety, integrity and excellence.” The letter also noted that the mining contractor wouldn’t allow the dancing workers to be subcontracted at any of its sites, in Australia or elsewhere.

It’s not clear from the video what safety violations took place, the Associated Press noted. According to WestAustralian, the dancing miners wore helmets, lamps and glasses, and had oxygen on hand. They were, however, shirtless.